Use the current official form and instructions, confirm the tax period and signer, and keep a complete copy of every attachment and delivery record.
Choose the page that matches the actual notice, form, enforcement step, decision, record problem, or term—not merely the broadest phrase. Each guide states the file to build, the distinction to verify, common mistakes, and primary sources.
How to use this library
- Start with the exact name or number printed on the document.
- Confirm the taxpayer, entity, tax form, and tax period before combining records.
- Open the closest guide and build its issue-specific evidence list.
- Check the official source and the current instructions on the controlling document.
- Use a checklist to record delivery proof, follow-up, and unresolved questions.
Browse IRS Forms
Form 1040-X Amended Return
This form amends a previously filed individual income tax return; explain each change and attach the schedules or statements required by the current instructions.
Form 1065
This form reports partnership income, deductions, and partner information; reconcile the partnership books with all Schedules K-1 and identify the authorized signer.
Form 1099-NEC
This form reports certain nonemployee compensation; confirm payer, recipient, amount, tax year, and any correction status.
Form 1120 S
This form reports income and deductions for an S corporation; reconcile payroll, officer compensation, distributions, basis records, and Schedules K-1.
Form 12153 CDP Request
This form requests a Collection Due Process or equivalent hearing when the applicable notice permits it; use the address and deadline on the notice and identify the collection action and…
Form 2848 Power of Attorney
This form authorizes an eligible representative to act for specified tax matters; list the taxpayer, representative, tax forms, periods, and permitted acts precisely.
Form 433-A Collection Information
This form provides detailed collection financial information for an individual; reconcile income, expenses, assets, debts, and attachments to current records.
Form 433-B Business Information
This form provides collection financial information for a business; tie cash flow, receivables, assets, payroll, and ownership figures to the books.
Form 433-F Collection Statement
This form provides a streamlined collection financial statement in some cases; confirm the IRS requested this version and support the figures with current documents.
Form 4506-T Transcript
This form requests specified tax return transcript information; choose the correct transcript type, form, period, recipient, and authorization.
Form 656-B Booklet
This form contains the Offer in Compromise forms, worksheets, and instructions; use the current booklet and complete the financial package that matches the taxpayer type.
Form 656 Offer In Compromise
This form submits an Offer in Compromise proposal; identify the legal basis, offered amount, payment option, and required compliance and financial attachments.
Form 843 Refund Penalty Abatement
This form claims certain refunds or requests abatement of certain tax, penalty, fee, or interest amounts; verify that Form 843 is the correct claim form for the tax and relief requested.
Form 8821 Tax Information Authorization
This form authorizes disclosure of tax information but does not grant representation authority; specify the appointee, forms, periods, and information access needed.
Form 8857 Innocent Spouse
This form requests relief from certain joint-return liability; separate the relief category, tax years, knowledge facts, household history, and safety concerns.
Form 911 Taxpayer Advocate
This form requests assistance from the Taxpayer Advocate Service; describe the unresolved tax problem, hardship or delay, prior attempts, and relief requested.
Form 940 Futa Return
This form reports annual federal unemployment tax; reconcile taxable wages, state unemployment contributions, deposits, and amendments.
Form 941 Employment Tax Return
This form reports quarterly federal payroll taxes; reconcile wages, withholding, Social Security and Medicare taxes, deposits, and corrections.
Form 9423 Collection Appeal
This form requests a Collection Appeals Program conference for eligible collection actions; identify the action, employee or manager contact, disagreement, and proposed resolution.
Form 9465 Installment Agreement
This form requests a monthly installment agreement; use current balance and compliance information and choose a payment amount and date that can be maintained.
Form Schedule C
This form reports sole-proprietor business income and expenses with Form 1040; reconcile gross receipts, cost of goods, expenses, vehicle use, home office, and information returns.
Form Schedule E
This form reports certain rental, royalty, partnership, S corporation, estate, trust, and residual interests; separate each property or pass-through activity and keep basis and…
Form W-2
This form reports employee wages and withholding; match employer identity, wages, withholding, Social Security information, and correction status.
Form W-9
This form provides a taxpayer identification number and certification to a requester; verify the legal name, tax classification, identification number, requester, and secure delivery method.
Quality boundary
These pages do not estimate personal outcomes, rank private firms, or replace a credentialed review. When a deadline, levy, payroll tax, litigation, fraud concern, business shutdown risk, or sensitive spouse issue is present, preserve the date and consider qualified help promptly.
Official sources to verify
Rules, forms, addresses, thresholds, and deadlines can change. Check the current official page and the instructions printed on your own document before acting.
- IRS forms and instructionsOfficial government, court, or taxpayer-assistance source.
- Taxpayer Bill of RightsOfficial government, court, or taxpayer-assistance source.
- Taxpayer Advocate ServiceOfficial government, court, or taxpayer-assistance source.